Astral projection time travel is an advanced technique that practitioners say is possible. But its important to recognize that one cannot simply start projecting on day one and expect to be able to time travel. It does take some time and practice.Their are many different realms to travel to. The astral planes are a vast beyond imagination, however it seems possible to more or less categorize the astral planes into five realms. These are in no particular order, the realm of time(time travel), the realm of the cosmos(space), the realm of guidance(intellect and wisdom) and the realm of spirituality. It's also believed that each realm has many levels and as the levels are dispersed upward throughout each realmOne should recognize that the need or attempt to think of the astral planes as organized or categorized is purely for the purposes of our physical mind. How and what the astral planes are we will never truly know. And neither does it matter, it's there to be explored. It is a skill we are born with each and everyone one of us, whether or not we consciously choose to exercise it.Having said that, it would also appear that their are gateway like areas that lead us from the initial astral plane to other realms. As you might imagine, they are more or less organized by realm. There is the gate of time, the gate of the cosmos, the gate of the spiritual plane and the catchall gate of the other realms.If you wish to travel to other times, advance practitioners suggest its definitely possible to visit these other realms as passive observers. Of course this is the case with all astral travel. We can observe, learn about the universe and the world around us, but never affect any physical change.Essentially once astral projection is achieved you are in the realm of the present. This is where most traveler's explore and expand their journeys. However if you wish to journey to other times one must do so through the gate of time after passing through the original astral gateway. Everything is essentially locked in these planes. It's also important to understand that the future you explore may not be the only possible course of events, you are visiting one possibility.